Bill Cosby Charged With Sexual Assault Of A Woman From 12 Years Ago

Bill Cosby was arrested for sexual assault on a women from 12 years ago, Now this happened 12 years ago. However, all of a sudden a bunch of women at one time said that "Bill Cosby raped me. He drugged me." They all said it at the same time. I could undertsand that one woman may have popped up and said this, then later another one, but they all said it at the same time. Wouldn't that be suspisious? Also, if the sexual assault happened 12 years ago then why didn't the woman react earlier when the rape happened? When something bad happens you're suppose to report it right away. It took the woman 12 years to report Bill Cosby. I don't understand why people act at the wrong time.